I can confirm that it worked in my car with the iSimple gateway.
Did it maintain the steering wheel controls? I originally ordered the adapter, and when I read that it wouldn't work with most cases (I have a Switcheasy Tones case) I cancelled the order and got the .02 cable version. Then when I got it the lightning portion was thicker than the standard cable, and wouldn't fit with my case. Also, the steering wheel controls would not function. (When I hit Seek on the steering wheel to get to the next song, it would pause the current song.) I decided to return it because I didn't want to have to remove my case everytime I want to use it. At this point, I'm thinking of just going on eBay and getting an older version iPod to leave in the car exclusively for music.